When researching ancestors in Lenawee County you must do some of your research at the main library in Adrian. They hold a variety of sources that include.
Lenawee County Index to Births and Deaths (late 1860's - 1979)
Gravestone Records of Lenawee County, by Harriet Cole Bowen. (compiled 1940's)
Michigan Pioneer and Historical Collection (40 volumes)
Official Records of the Union and Confederate Armies in the War of the Rebellion (128 volumes)
Record of Service of Michigan Volunteers in the Civil War, 1861-65 (46 volumes)
Federal Census, 1830 - 1930
State Census, 1845, 1884, 1894
Adrian Newspapers (published under a variety of titles), 1850-current
So when you are ready to go make sure you plan out what you need to research and have a plan. The librarians are anxious to help you.
I will be away from my computer for the next three days. Back posting on Tuesday.